Occupational Segregation vs Gender Pay Gap
Occupational Segregation and Gender Pay Gap are two Labor Economics concepts in AP Economics that students often mix up. Occupational segregation is the uneven spread of demographic groups across jobs, so some occupations end up heavily male, heavily female or racially skewed. The gender pay gap is the average earnings difference between men and women, measured either unadjusted or adjusted for hours, occupation and experience. Here is how they compare side by side.
Occupational segregation is about which jobs people hold, not what they are paid inside a given job. It moves earnings through the crowding hypothesis: pushing one group into a narrow set of occupations raises labor supply there and drives the wage down, while restricting supply in the occupations they are kept out of props wages up. Nursing and early childhood teaching are heavily female, while construction trades and long haul trucking are heavily male. The causes are mixed and disputed, spanning hiring and promotion barriers, differences in training and licensing, expectations formed long before anyone enters the labor market, and preferences over hours and conditions. The contrast with wage discrimination is clean: that is unequal pay for the same work, while segregation is unequal access to different work.
Two very different numbers hide behind the phrase, and they are not interchangeable. The unadjusted or raw gap compares the typical earnings of all men with all women, usually among full time workers, so it includes differences in hours, occupation, industry, seniority and time spent out of the labor force. The adjusted gap compares men and women who match on those measured characteristics, and it is substantially smaller than the raw gap, though studies rarely find that it is zero. Both answer real questions: the raw gap describes the overall earnings distribution, while the adjusted gap asks whether like is paid the same as like. A gap is a measurement and discrimination is one possible cause of it, so quoting a single figure as proof either way is a mistake.
Occupational Segregation vs the Gender Pay Gap: A Sorting Pattern and an Earnings Difference
| Occupational Segregation | Gender Pay Gap | |
|---|---|---|
| What it measures | How demographic groups are spread across occupations | The average earnings difference between men and women |
| How it is reported | Shares of an occupation held by each group | Dollars, or women's earnings as a percentage of men's |
| Where the difference sits | Between jobs | Across all workers, whichever job they hold |
| Can it exist without the other | Yes, if the male-dominated and female-dominated fields happen to pay the same | Yes, a gap can open inside one occupation or one firm |
| Is pay setting involved | Not directly, since it is about who ends up where | Directly, since it includes what each worker is paid |
| Effect of controlling for occupation | The control is the thing being measured | The measured gap shrinks, because one channel has been removed by construction |
| What would close it | Different entry routes, hiring pipelines and training | A mix of occupation change, hours, experience and pay setting inside firms |
Sorting alone can produce a pay gap while every job pays men and women the same
Build an illustrative economy with two occupations. Occupation A pays 30 dollars an hour and occupation B pays 20, and inside each one every worker earns exactly the same regardless of sex. Suppose 80 percent of men work in A and 20 percent in B, so average male pay is 0.8 times 30 plus 0.2 times 20, which is 28 dollars. Suppose 30 percent of women work in A and 70 percent in B, so average female pay is 0.3 times 30 plus 0.7 times 20, which is 23 dollars. The gap is 5 dollars, or 17.9 percent of male pay, and women earn 82.1 percent of what men earn on average. Not one dollar of that came from paying two people differently for the same work. Now raise pay in occupation B to 26 dollars. Male average becomes 29.20, female average becomes 27.20, and the gap falls to 6.8 percent without a single person changing occupation. Both results follow from arithmetic, and both are made up to show the mechanism rather than to describe any real economy. What they show is that a gap can be produced by sorting, by pay levels across fields, or by the pay setting covered at /glossary/wage-discrimination.
Adjusting for occupation removes the sorting channel by definition, which is a choice rather than a correction
Two numbers get called the gender pay gap and they answer different questions. The unadjusted figure compares all men with all women and answers how earnings differ overall. The adjusted figure compares men and women after controlling for occupation, hours, experience and similar factors, and answers whether two similar people in similar roles are paid alike. Neither is the honest one. Each control removes a channel, so if segregation itself reflects barriers to entering better-paid fields, or a pattern where work dominated by women is valued lower, then controlling for occupation quietly assumes away the thing under investigation. Read them together instead. A large unadjusted gap with a small adjusted one points at sorting, hours and career interruptions rather than unequal rates for identical work. A gap that survives every control points at pay setting inside firms. Other channels sit alongside both: hours worked, years of continuous experience, and the extra pay attached to unpleasant or risky conditions described at /glossary/compensating-differential, which is one reason field-level pay differs before anyone is hired. The practical advice for an exam answer is to say which version you are using before you quote a figure, and to name at least one channel behind it.
Frequently asked questions
Does occupational segregation cause the gender pay gap?
It explains part of it, because men and women are unevenly spread across occupations that pay differently, so average earnings can differ even where pay inside every job is equal. It is not the whole explanation, since gaps also appear within single occupations and within single firms.
What is the difference between the adjusted and unadjusted gender pay gap?
The unadjusted gap compares the average earnings of all men with all women, while the adjusted gap makes the comparison after controlling for factors such as occupation, hours and experience. The adjusted figure is usually smaller, because every control removes one route by which earnings can differ.
Is occupational segregation the same as wage discrimination?
No, occupational segregation describes where groups end up working, while wage discrimination means paying equally productive workers differently because of a personal characteristic. Segregation can arise with no employer ever paying two identical workers different rates, although barriers to entering a field can produce both at once.
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